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My Syma S107G has stop lifting off the ground. I have replaced the battery, both motors and the shaft. The motors are running with a lower RPM and screeching sound. The Heli just does not have enough power to get off the ground.
Has anybody else seen this issue? If yes, How did you fix it?
Screeching sounds like the gears are stripped, and would make the blades go slower. Look closely at the teeth, and make sure the tips of the teeth are sharp yet slightly rounded, not flat, meaning their stripped.
If the gears are fine, and nothing is bound up, look for a bad connection at one or more of the heavier wires feeding the motors. Ever hear a cars starter whine with a high pitched tone when the battery power is low, and cant turn the engine ?
These little motors can do that too. Is the sound electronic, or mechanical, slippage of nylon gears ? Dennis
PS: can you email me a video with sound to email@example.com
I think 15 to 30 seconds should work by email ok...
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